The GBA SP was the best one. Simply because it was the most backwards compatible VG system ever. And the backlit screen was a vast improvement.

my personal favorite would be the metalic silver gameboy pocket. it was the 2nd gameboy i ever owned and i thought that thing was so slick compared to the first gen gameboy i lugged around. As for the overall best machine i would have to go with the Advanced SP. The Micro would be my number 1 but that screen scratches so easily you have to baby it.

Same here.

I've only owned the original brick and Gameboy Micro (hot pink with a Famicom-style faceplate); I far prefer the latter -- backlighting and true pocket size portability for the win (though Shanghai pushes the limits of what you can do with that small a screen)!

I like my Pearl Blue SP, though I wish they could have made backlit versions of the Cobalt and Classic NES SP's. Personally, I always favored the design of the original GBA, I would have liked if they'd re-release that one with a back-light and rechargeable battery!

I have the Classic Gameboy, Gameboy Color, GBA, GBA SP and Gameboy Micro. I agree with the others that the GBA SP is the best because it is compatible to all gameboy games including Gameboy Classic and Gameboy Color. There is IMHO only one game that will not work properly with the design of the SP: Kirby's Tilt 'n Tumble. Because of the new cartridge slot orientation of the GBA SP, the motion sensor, made specifically for the Game Boy Color/Advance cartridge position, won't calibrate in the right direction on the Game Boy Advance SP.

I never had an SP or Micro, just the regular old GBA. No backlighting but at least I could play Kirby Tilt 'n Tumble

OT: I once tried to install the internal Afterburner backlight into my regular old GBA.
http://www.gameboy-advance.net/accessories/gba_afterburner_in...
This took me at least 10 hours or so. And at the end of this procedure the display was broken because I pressed to hard against it while re-inserting it. This was the most frustrating day in my life. I swear that I will never do anything like this again with my precious Gameboys.

well since i owned every game boy then sold it off i had to say the SP was the best because of a few reasons #1 it was compact and very simple 5 buttons. #2 you could play every gameboy game including the gameboy color and original gameboy games which is awesome i still have my pocket though and its awesome as well but the SP beats it cause of compatiablity and the AC Adapter

The original for me. Got me into gaming. Actually, I hate the original Game Boy; it ruined my social life before I even knew that the opposite sex were desirable.

I like my Micro but it doesn't play older games. I might pick up n GBC from ebay. I don't like playing my Link to the Past cart on the SP either.

Game Boy Advance SP, it has a backlight and it is backwards compitable with nearly all Game Boy and Game Boy Color games.